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CCFpams: Atmospheric Stellar Parameters from Cross-Correlation Functions

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Ada Coda
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CCFpams: Atmospheric Stellar Parameters from Cross-Correlation Functions

Postby Ada Coda » Mon Jul 17, 2017 9:26 am

CCFpams: Atmospheric Stellar Parameters from Cross-Correlation Functions

Abstract: CCFpams is a novel approach that allows the measurement of stellar temperature, metallicity and gravity within a few seconds and in a completely automated fashion. Rather than performing comparisons with spectral libraries, our technique is based on the determination of several cross-correlation functions (CCFs) obtained by including spectral features with different sensitivity to the photospheric parameters. We use literature stellar parameters of high signal-to-noise (SNR), high-resolution HARPS spectra of FGK Main Sequence stars to calibrate the stellar parameters as a function of CCF areas. For FGK stars we achieve a precision of 50K in temperature, 0.09 dex in gravity and 0.035 dex in metallicity at SNR=50 while the precision for observation with SNR>100 and the overall accuracy are constrained by the literature values used to calibrate the CCFs.

Credit: Malavolta, Luca; Lovis, Christophe; Pepe, Francesco; Sneden, Christopher; Udry, Stephane

Site: https://github.com/LucaMalavolta/CCFpams
http://adsabs.harvard.edu/abs/2017MNRAS.469.3965M

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